<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>flex布局</title>
    <style>
        .box{
            width: 110px;
            height: 110px;
            border: 1px solid #333;
            

            display: flex;
            flex-wrap: wrap;
            justify-content: flex-end;
            align-content: space-between;

        }
        .item{
            width: 20px;
            height: 20px;
            border-radius: 50%;
            background-color: #000;
            margin: 5px;
        }
        .item:nth-child(1){
            /* align-self 是指单独设置的align-items 可继承可 */

        }
        .item:nth-child(2){
            /* align-self 是指单独设置的align-items 可继承可 */
            /* align-self: end; */
        }
        .item:nth-child(3){
            /* align-self 是指单独设置的align-items 可继承可 */
            
        }
        .item:nth-child(4){
            /* align-self 是指单独设置的align-items 可继承可 */

        }
    </style>
</head>
<body>
    <div class="box">
        <div class="item"></div>
        <div class="item"></div>
        <div class="item"></div>
        <div class="item"></div> 
    </div>
</body>
</html>